https://www.modelscenerysupplies.co.uk/
Quote from their website:
Welcome to the UK leading online shop supplying hundreds of highly detailed scale model products and scenery sourced from over 60 manufacturers around the world.
With many products exclusively only available in the UK from this shop.
We supply items to industries and the hobbyists. Including;
- Architectural and Civil Engineering,
- Film and Television, Stage and Theatre,
- Special-effects Companies,
- Model Railway and Wargamer,
- Diorama Modelling and School Projects.